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I don't see how we can help here. This is a forum for devs programming with Qt/c++. You should ask the QTerminal devs.
@Majed-Y That's can do what you want.... [link text](link url)https://github.com/qpdf/qpdf
@YuChao-Hsu That's Objective C++. The code need to be in a *.mm file.